Meet the Wiseman Threading Tools Second Lead Metric HSS Tap in a left-hand configuration—built for precise, dependable threading on metals where reverse-threaded fasteners are required. This uncoated, ground high-speed steel tap delivers steady performance across general-purpose applications, making it a reliable choice for hobbyists and professional machinists alike.

Why this Wiseman tap stands out

• Left-hand threading: Specifically designed to cut left-hand threads, enabling quick assembly and disassembly in reverse-threaded applications without flipping tools mid-operation.
• Second lead: The second-lead geometry enhances start-up efficiency and reduces the risk of cross-threading, especially in tougher or positioning-critical materials.
• Metric precision: M30x1.5 thread size with ISO 529 dimensions ensures compatibility with common metric components and standardized fasteners.
• HSS ground finish: High-speed steel provides solid wear resistance and consistent thread quality, while the ground finish helps maintain accurate thread alignment during tapping.
• Uncoated and general purpose: The bare, uncoated surface profile is versatile for a wide range of materials and machining setups, with the option to apply your preferred lubricant for extended tool life.
• USA plug lead design: Configured for straightforward integration into standard tapping setups, streamlining workflow in shop environments that favor familiar lead geometry.

Ideal use cases

• Installing left-hand fasteners in automotive, bicycle, or machinery assemblies where reverse-threaded components must be secure or removable with ease.
• Repair work or fabrication tasks that require reliable left-hand taps on steel, cast iron, or other common metals.
• Prototyping and small-batch production where consistent thread quality and predictable start-up behavior matter most.

Technical specifications at a glance

• Tool type: Tap for left-hand threads
• Material: High-speed steel (HSS), ground finish
• Coating: Uncoated
• Thread size: M30 x 1.5
• Standard: ISO 529
• Lead: Second lead (USA plug lead)
• Application: General-purpose threading in metalworking projects

Practical tips for best results

For optimal performance, use a compatible tapping lubricant and steady, even feed to minimize chatter and prolong tool life. Begin with light pressure to establish alignment, then progress to the recommended depth until the full thread is cut. After use, clean chips away and store in a dry environment to preserve the uncoated steel’s edge and accuracy for future jobs.

Who benefits from this tap

Engineers, fabricators, hobbyists, and repair technicians who regularly work with left-hand threaded components and require a dependable, metric tap that aligns with ISO 529 standards. The Wiseman name signals seasoned craftsmanship and a track record of precision tools designed to perform in real-world workshop conditions.